Enameling furnace



A. F. H. SEELIG ENAMEL'ING FURNACE 4 Sheets-Sheet 1 Filed April 12 1922 F317; .2. F 44 5.43 g

In Vania/n- A. F. H. SEELEG ENAMELING FUR AbE' Filed April 12 1922 4 sheets sheet Z m M, H9245.

A. F. H, SEELJG ENAMELING FURNACE Filed April 12, 1922 Sheets-Sheet 4 :the accompanying specification amount of radiation;

Patent Nov. ll, teas.

ALBERT F. H. SEELIG, OF LOUIS, MISfiUURE.

ENATEELING FURNAGE.

Application filed. April 12, 1822. Serial lilo. 551,785.

T0 at whom it may concern:

Be it known that I, ALBERT F. H. SEELXG, a citizen of the UnitedStates, residing in the city of St. Louis and State of Missourh have invented new in Enameling Furnaces, of which lowing is a specification.

This invention relates to furnaces and while the invention may be employed in the contruction of furnaces for any purpose. in

l have described the same as applied to an enameling furnace of the recuperator type. r The general object of the invention is to produce a furnaceof this kind having a construction which will operate to extract a relatively large amount of the heat from the hot gases before permitting the same to pass to the stack; to provide improved means for circulating or directing the hot gases through the heating chamber and through or around the Walls thereof to reduce the to provide improved means for heating the incoming air for combustion in the furnace; to provide improved the fol- .means for regulating and controlling the flow of gases and air through the furnace; and also to provide means for facilitating the examination of the flames or gases passing through the heating fines. v

Further objects of the invention Will appear hereinafter.

The invention consists in the novel features, and in the general combination of parts to be particularly described hereinafter, all of Which contribute to produce a simple and efiicient enameling furnace. A preferred embodiment of my invention will be particularly described in the following specification, While thebroad scope of my invention will be pointed outin the append ed claims.

In the drawing,

Figure l is a longitudinal vertical section through the enameling furnace;

I Figure 2 is a vertical cross section through the furnace taken on the line 2-2 of Figure 1;

Figure 3 is a horizontal section through the furnace taken about on the line 3-3 of Figure 2;

Figure 4 is a vertical section line 4-4 of Figure 2; and

Figure 5 is a section taken about on the line 5-5 of Figure but this view is frag= mental-y and broken away.

and useful improvements taken on the l The furnace includes a fire-box, burner or producer 1 in which producer gas may be formed before passing into the body 2 of 6 the furnace.

Any desired kind of firing may be enr pl'oyed; Where producer gas firing is used a water pipe 3 may be provided delivering to drip-pans a just inside the ash door 5 at the back of the furnace. The rear wall (3 of the producer may be provided with an elevated charging door 7. lhe body of the furnace includes a heating chamber 8 hav ing vertical side Walls 9 and having an inner arch 10 on its upper side. Within this heat ing chamber a mufile 11 is supported, the bottom 12 of the mufiie resting upon piers or battle Walls 13 (see Figures 2 and 3). 'Thesc v Walls extend parallel with each other so that the space between them is formed into a main combustion chamber 14: which receives the hot gases from the producer as they come over the bridge wall 15. :These bames 13 terminate short of the iorward wall 16 of the furnace so that the hot gases can turn at their rear ends 17 and pass toward each side; in this way the hot gases are made to return toward the back of the furnace in re-passes through secondary combustion chambers 18 (see Figures 2- and 3) By this means I direct the hot gases in a plurality of passes directly under the bottom of thc mufiie and I increase the virtual length of the combustion chamber to such an extent as to insure a very complete combustion taking place under the bottom of the mullle.

The edges of the bottom 12 of the muflle and the side Walls of the muiile are supported on buttresses 19 which extend in from the side Walls 9 of the heating chamberand these buttresses are carried up to the level of the line 20 under the arch l0 and over the upper side of the arched cover or arch 21 of the muffle. These buttresses 19 are disposed equidistant apart so as to form a plurality of gas fines 22 Whichdirect th gases past the side walls of the mufile. After leaving these gas lines the gases pass into the upper portion oi. the heating chamber directly under the arch 10. Y

According to my invention I provide means for receiving the gases from the heating chamber 8 and circulating the same through the side walls of the furnace. In other ords I provide the heating chamber with a iachct including vertical side walls 23 which, are

spaced from the side walls oetu'een the walls 9 or the heating chamber and which are surmounted by an upper srch or outer arch jThe is, of course, separated from the by an arch space 25 which mwith the side jacket spaces 26 9 end 23. i prefer to from the heating chsnr :24: which overlies the inner arch 10.

: rch

take the hot gases 8 through the key-stone es of the in.- ner this part 0t arch, for which purpose provided with a plurality of Through th se openings the in the manner indicated by the euro in Figure 2.

K then these hot gases through the jacket space. i construct the furnace in such a way that the incoming hustiou in the furnace is carried through the jacket space 26 and in this Way 1 prethe air so that the furnace will operate es recuperation "furnace. The incoming air is heated methodically, that to say,

while provide means for passing the hot zscs in contuct with the air fines, the gen I direction of flow. of the air through fines is opposite to thet of the hot gases. The may pass up from the coinoustion chamber 14 through openings 14-, Figure l, to come into contact with the hen l of the muiiie.

Fu thci'more uccording to my invention I 1 means for controlling the flow of air through the air lines and for cutting of? st Wlll the flow through the uppermost or these fines. I prefer to provide a pair of vertical header fines 28 (see Figure which are huilt in the heck Wall of the furnace body. The air lines 29 are simply ps1- ulcl conduits set in the jacket space 26 communicating with each other in series. the air being admitted, through air iinets 30 into the lowest sir fines. this point- "he uir passes toward the frontsud fiowssuccessively through the air fines as indicated by thearrows in Figure 4. In addition to the hottoni air=inlets 30 each puss or air may he provided With its own individual airinlet 31. These air in ere ullclosed by removable plugs 3.2 in furnace Well which may he provided upers if desired. As the air flows f the air fines 29 it becomes heated {fuses which pass down through ducts 33 formed between the dues and rcrticsl unlis of the furnace (see ore Uovide means for regulating the flow hetween the air iiues 29. For-this provide movable grates or slides 3 in the end bricks bricks. are in These fvision'walls between the air snovin them in all. the Way rhe upper "dues from the of the air tines 29 at the air for com- From.

he removed it rear of the furnace are provided with emer gency outlets 35 closed icy removehle olugs 36 which lead from the air fines directly into the header fines 28. This orgsnizution enables me to utilize the dampers to retard the flow of the air to regulate the temperature thereof When delivered at the combustion chamber. Also ifdesired, by completely shutting the upper dampers 8s and removing the properplug or closure 36, the air can he lay-passed from the upper sir fines and sent directly into the air header 28. Removable stoppers 3'? may be employed. in the front wall of the furnace for giving access to the front ends of the air fines for observation purposes.

As the hot gases leave the nests of air fines they ass into header fines 38 located at each si e of the furnace (see Fig. 2) and the ends of tliese headers communicate with up-teke flues 39 at each side of the furnace (see Fi 2); and the upper ends of these headers communicate With stack fines 40 built in the cover-Wall 41 of the furnace which lead the hot gases to the stack. In order to regulate the flow of the hot gases as they pass through the jacket the side walls of the furnace are provided with dampers 4:2 in the form 01": loose bricks in the well (see Fig. 2). dampers in they will cutl ofi" more or less the flow of gases through the np tahe, Hues 39.

In. order to regulate the flow. of the gases from the heating chamber into the jacket the outlets 27 are provided with one or more closures 43 which may he simply blocks oi fire-brick resting; on the top of the arch. in order to render these block dumpers accessible from the exterior I provide removable plugs 44 directly over them in the cover Wall 41. By removing the plugs 4- the furnace-mun may insert a pinch-bar through the opening and shove the damper blocks 43 into any position desired. 1 also prefer to mount the plugs 44 in larger removable plates 45,.respectively, which may necessary to remove the damper blocks 43. These plates 45 seat on the key-stone oi" the arch through which a large opening 46 is formed through Which the damper blocks may be inserted.

Although the floor or thoinuiu comhustion chamber 14; is level, prefer to provide an inclined floor in the secondary comh'ustion chambers 18 (see Figure 5). The inclination of this floor tends to initiate an upward movement of the gases to start the .fiov. through the fines 22.

After the hot air down through the header fines 28 it passes through epenings 4-8 Which deliver t eh is air over the bridge 15 (see Figure 1). i i

addition to fines the By shoving these 1 "the bafiie walls 1 nuance inner end or head 49 of the mutile is provided with gas fines 50 which are directly over the highest point of the inclined floors 47. These inclined floors prevent any possibility of forming a dead pocket under-the back end'of the mufile.

Similar fines 5O are openings'la I In order to enable the interior of the niufiie to be examined when desired I provide peep holes 51 in the forward -\\'all of the furnace having removable plugs 52.

In order, to'enable the condition of the gases passing u I the vertical fiues 22 to be inspected provide peep holes 53 in th forward wall of the furnace which align with a. plurality of peep holes 54 which are formed in alignment with each other in the buttresses 19.

The gas fines 50 and-50 are formed between buttresses 55 which extend vertically across the back end of the muffle.

The forward wallof the furnace is provided with a suitable charging opening 56 with a door 57.

The bottom and side walls of the muific 11 are preferably constructed of fiat tiles with interlocking connections as shown. Preferably the intermediate 'joints between these tiles in the bottom are located over 3 and the joints at the edges of the bottoih are formed over longi'tudinal sills 58 supported on the buttresses 19.

In constructing the furnace the upper arch 24: may be supported on wooden forms resting on the inner arch and which can be left in place and burnt out when the furnace is put into operation.

What I claim is:

1. In a furnace of the kind described, the combination of a heating chamber, a mnflle supported therein, and means for directing the hot gases in a plurality of passes and in opposite directions under and in direct contact with the bottom of the mnfile.

2. In a furnace or the kind described, a heating chamber, a mufile supported therein, a fire-pot or burner, means for directing the gases of combustion from the fire-pot into contact with the bottom wall of the muffle, air fines in the side walls of theheatin chamber, meaiis for passing air in an ward direction through said fines. meansfor conducting the combustion gases aftercontact with the bottom of the muflie upward around the side and top walls of said muffle and then downward into contact with the located over the 1 air fines to heat the air passing upward therethrough, and means for delivering the air from the said flues adjacent the fire-pot. to supply air for combustion.

3. In a furnace of the kind described, the

combination of a heating chamber, a mnffie supported therein, with its walls spaced from the walls of the heating chamber, a fire-pot or blllIlE1' a combustion chamber leading from the fire-pot under the bottom of the mufile, so that the heated gases pass under the bottom of the mufile, means for directing the hot gases in another pass, under the bottom of the muflie, means for conducting hot gases thereafter up the side walls of. the muflle, air-fines in the walls of the heating chamber to receive incoming air,

means for directing the hot gases into contact with the said air-fines to heat the incommg air, and means-for delivering the incoming air adjacent the fire-pot to supply oxy-' gen for combustion.

4. In a furnace of the kind described, the combination of a plurality of substantially parallel airfiues, means for passing hot gases in contact with the walls of the tines to heat the air passing therethrough, a header fiue extending transversely to the parallel fines, means operable from the exterior of the furnace for closing ofi" the communication between the parallel fines, said air flues having openings with closures therein. leading from the same into said header fine, and means for rendering the said closures accessible from the exterior of the furnace,

In a furnace of the kind described, the combination of a plurality of substantially parallel air-fines connected together inf so so that the air passes through the fines dering the said closures accessible from the exterior of the furnace.-

1 I 6. In a furnace of the kind described, the

combination of a plurality of substantially 3 parallel air-fines connected together in series, so that the air passes through the fines in succession, means for passing hot gases in contact with the walls of the fines to heat the air passing therethrough. a header flue ext ngling transversely to the first named fines, gates mounted in the furnace wall at the ends of the air fines and operable from the exterior of the furnace for closing ed the communication between any of the parallel fines and its adjacent fines, said airfiues having openings with closures therein leading from the same into said header-fine, and means for rendering said closures accessible fromthe exterior of the furnace, whereby the air passing through the air-.

mufile spaced from the walls of the heating chamber, a jacket wall surrounding the wall of the heating chamber with a jacket space between the walls of the chamber and the jacket, means for circulating hot gases under the muffle and through the space between the muflle wall and the wall of the heating chamber. means for onducting the hot gases from the heating chamber through the jacket space, air flues disposed horizontally in the jacket space and receiving heat from the hot gases, a fire-pot delivering the hot gases to the heating chamber and receiving heated air from the air-fines.

15. In a furnace of the kind described, the combination of a fire-pot, a heating chamber receiving the hot gases from the fire-pot, a muflie mounted within the heating chamber. with its walls spaced from the walls of the heating chamber, a jacket wall surrounding the. heating chamber with a jacket space between the walls of the jacket and heating chamber, means for directing the hot gases under the muffle and throu h the space between the walls thereof and t e walls of the heating chamber, air-fines dis posed horizontally in the jacket space, means for directing the hot gases from the combustion chamber downwardly past the air-flues, to heat the air therein, said furnace having a cover wall with fines therein, receiving the hot gases from the jacket, and means for delivering heated air at a'point adjacent the fire-pot.

16. In a furnace of the kind described, the combination of a fire-pot, a heating chamber receiving the hot gases from the fire-pot, a mufile mounted within the heatin chamber, with its walls spaced from the walls of the heating chamber, a jacket wall surrounding the heating chamber with a jacket space between the walls of the jacket and heating chamber, means for directing the hot gases under the muffle and through the space between the walls thereof and the walls of the heating chamber, air-fines dis posed in the jacket space, means for directing the hot gases from the combustion chamber downwardly past the air-fines, to heat the air therein, up-take flues built in the furnace wall receiving the hot gases beyond the air fines and conducting the same upwardly, said furnace having a cover wall with horizontal flues therein to lead the gases from the up-take f ees t ward the stack.

17. In a furnace of the kind described, the combination of a fire-pot, a heating chamber, a mutile supported therein with its walls spaced from the walls of the heating chamber, said furnace having a main combustion chamber under the middle portion of the muliie receiving the hot gases from the fire-pot, having batiic walls forming the sides thereof, extending away from the firepot and terminating short of the opposite wall to permit the gases of combustion Lu turn their ends, secondary combustion chamhers taking the gases from the main combastion chamber, and having bottom walls inclining upwardly in the direction in which the gases pass over them, side gas fines and end gas flues receiving the gases from the said combustion chambers and conducting the same up the side walls and up the end wall of themufiie.

18. In a. furnace oi the kind described, the combination of a fire-pot. a heating chamber, receiving the gases from the firepot, a mnflle supported in the heating chamber with its side walls separated from the side walls of the heating chamber, buttresses extending upward between the walls oi" the muflie and the heating chamber, and forming side gas fines, and means for conducting the hot gases up the said fines, said buttresses and the end wall of the furnace having aligning peep-openings through which the flames in the side flues may be seen.

In testimony whereof, I have hereunto set my hand.

ALBERT F. H. SEELIG. 

